Analysis

  • max time kernel
    130s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-05-2024 15:42

General

  • Target

    2024-05-21_3dc5d8f08e9d1f4fb64b94e5a01b24b2_cryptolocker.exe

  • Size

    62KB

  • MD5

    3dc5d8f08e9d1f4fb64b94e5a01b24b2

  • SHA1

    586388baa3f43c0d6d2b33b161056a478f0873c6

  • SHA256

    18a3b0ed094abc0bd6d5c7f0649e81f8a67594dd76ea9bd25f6e5087da9b9983

  • SHA512

    a71a9dfeaa3ff4dbbf7660982339564f9e12bba8e63174d348f8356a5d7b9a2681f36e69175aa335a607d48c7d9fd295fb11f958451aa0bc04b18947a200bc0a

  • SSDEEP

    768:3Uz7yVEhs9+Hs1SQtOOtEvwDpjO9+4hdCY8EQMjpi/Wpi3B3URiLqCyLuAx8XG9P:3P+HsMQMOtEvwDpjoHy7B3g9CWuAxWS

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies system certificate store 2 TTPs 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-21_3dc5d8f08e9d1f4fb64b94e5a01b24b2_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_3dc5d8f08e9d1f4fb64b94e5a01b24b2_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5116
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:2676

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\misid.exe

    Filesize

    62KB

    MD5

    0393be49e502e4805e2891a58ddf9ccf

    SHA1

    b49c57f07eac412e0e07b04d51acb369101863a6

    SHA256

    fa90632d7eb538a253c959dbcbcd939800e67595416790e473161fd7f069321c

    SHA512

    341033a15f2e738565cec3ea5c5894fcf793c7b8e1ea1c082a0dd253fd064fb39ea5a4fcc7c57daa479054626e00b5d368aee334b65bfa2674ba92c948352e89

  • C:\Users\Admin\AppData\Local\Temp\misids.exe

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2676-18-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/2676-50-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/5116-0-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/5116-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/5116-2-0x0000000000510000-0x0000000000516000-memory.dmp

    Filesize

    24KB

  • memory/5116-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/5116-17-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB